JoinMarket NG Announcing today a full rewrite of all JoinMarket components in modern Python. Focusing on performance, maintainability, and extensibility. While maintaining compatibility with the existing JoinMarket network.
GitHub
GitHub - m0wer/joinmarket-ng: JoinMarket (Bitcoin CoinJoin) modern alternative implementation
JoinMarket (Bitcoin CoinJoin) modern alternative implementation - m0wer/joinmarket-ng
 Why JoinMarket? Has no central coordinator: most censorship resistant and peer to peer. Why a rewrite? The reference implementation has served the community well for years, and we're deeply grateful for all that the contributors have done. However, the project is no longer actively developed (181 open issues and 41 open pull requests) and had architectural limitations such as relying on Bitcoin Core's BerkeleyDB wallets (deprecated since v26.0.). New features: - Support for light clients using Neutrino - Rate limiting to prevent logs flooding - Extensive protocol and implementation documentation - Realistic E2E tests including reference implementation makers and takers Future plans: - Nostr relay integration - Lightning Network integration (CoinJoinXT) to hide roles and eliminate fee traces - A lot more ideas Help wanted: - Funding: Applied to HRF Bitcoin Dev Fund and soon to OpenSats. Other grant ideas or direct donations welcome. - Security: Need sponsorship or a volunteer for external security audit. - Contributors: Peer review, testing, documentation. Entrypoint for migrating makers:
GitHub
joinmarket-ng/maker at master ยท m0wer/joinmarket-ng
JoinMarket (Bitcoin CoinJoin) modern alternative implementation - m0wer/joinmarket-ng
 The reference JoinMarket served us well for a decade. Let's make sure the protocol thrives for the next one.
There is an ongoing attack against JoinMarket makers where a random nick not serving onion constantly sends !orderbook requests through directory servers. The makers and directories mostly cope with the load, but the log files, which have a hardcoded debug log level, grow several gigabytes per hour and crash many makers. A solution is to setup hourly log rotation. In Debian systems, you can move logrotate from daily to hourly cron using: ``` dpkg-divert --add --rename --divert /etc/cron.hourly/logrotate /etc/cron.daily/logrotate ``` The default user data directory is `$HOME_DIR/.joinmarket`. Create a logrotate config: ``` /home/user/.joinmarket/logs/*.log { hourly size 100M copytruncate rotate 24 notifempty missingok } ``` To install and test, save the config to `/etc/logrotate.d/joinmarket-logs`, test it with `sudo logrotate -d /etc/logrotate.d/joinmarket-logs`, and force run manually with `sudo logrotate -f /etc/logrotate.d/joinmarket-logs` or wait for automatic hourly execution via cron.